WO2016061813A1

WO2016061813A1 - Lamp bulb having hollow led luminous body

Info

Publication number: WO2016061813A1
Application number: PCT/CN2014/089435
Authority: WO
Inventors: 傅立铭
Original assignee: 苏州汉克山姆照明科技有限公司
Priority date: 2014-10-24
Filing date: 2014-10-24
Publication date: 2016-04-28

Abstract

A lamp bulb having a hollow LED luminous body, comprising a hollow LED luminous body, a support and a lamp bulb cover; the hollow LED luminous body is packaged in the lamp bulb cover via the support; an inner cavity of the lamp bulb cover is filled with a heat conducting gas; the hollow LED luminous body comprises a fluorescent tube (1), an LED light source (2) sleeved in the fluorescent tube (1), pins (3) connected to two end edges of the LED light source (2) and extending out of the fluorescent tube (1), and slide-stopping pieces (4) provided on the pins (3) and used to fix the fluorescent tube (1); an air flow is maintained between the inner cavity of the fluorescent tube (1) and the inner cavity of the lamp bulb cover via tube openings at two ends of the fluorescent tube (1); an inner side of the fluorescent tube (1) is uniformly coated with fluorescent powders; and the LED light source (2) comprises a substrate (21) and an LED chip (22) fixedly provided on the substrate (21). The hollow LED luminous body guides high-temperature heat to flow quickly and be effectively dissipated via a chimney effect, thus reducing an LED surface temperature, avoiding a blue leakage phenomenon, extending a service life of the lamp bulb, and having a good illumination effect.

Description

Light bulb with hollow LED illuminator

Technical field

The invention relates to an LED bulb, in particular to a bulb with a hollow LED illuminator, belonging to the technical field of illumination.

Background technique

LED has long life, power saving, small size, no mercury pollution and other characteristics, in line with environmental protection needs, with the advancement of chip packaging technology, the application field has been gradually extended to the use of lighting and panel backlights. LEDs generate light and heat by inputting electrical energy to excite the chip. In the current technology, the ratio of light to heat released is about 25%: 75%.

LED light and heat have two major characteristics: the first is that its light has directionality, its light-emitting direction is hemispherical, and the illumination angle of the LED is about 20 degrees, so its direct positive light is the strongest, lateral light The second is that when its temperature is too high, there will be light decay, so heat dissipation is needed to maintain normal luminous flux.

LED filament is also called LED lamp post. In the past, LED light source should reach a certain illuminance and illumination area. Optical devices such as lenses should be added, which will not only affect the lighting effect, but also reduce the energy-saving effect of LED. The LED filament can realize 360° full-angle illumination, and no need to add a lens to achieve a stereo light source and good illumination effect.

At present, the practice of LED filament in the industry is generally as follows: transparent glass plate is used as the substrate, and the line is formed by electroplating copper plating, and the lead wire is bonded to the solid crystal bonding wire, and then the phosphor coating package is mixed with low-flow silicone. Covering the whole glass rod; it will not expose the blue light because it is completely covered, but the coating is more complicated and less controllable, so the poor color control and blue leakage are common; then the LED filament is packaged into the traditional light bulb to replace the original It has a filament and is filled with nitrogen to make an LED bulb. However, there are still problems as follows: the thermal conductivity of the glass is poor, the thermal conductivity of the optical silica gel is extremely poor, and the thermal conductivity of the nitrogen is also poor, so the heat dissipation efficiency is still poor, and only the temperature is sealed in the filament and cannot be exported.

Therefore, in the prior art, the bulbs made of LED filaments have the common disadvantages: direct reduction of the brightness of the bulb due to high temperature light decay, and discoloration (due to the fact that the phosphor cannot withstand high temperatures); It is limited to the beautiful shape of the bulb and increases the manufacturing cost. At the same time, due to the process limitation of the packaging manufacturing, the blue leakage phenomenon directly affects the luminous effect, resulting in poor product stability.

Summary of the invention

The main object of the present invention is to overcome the deficiencies in the prior art and provide a bulb with a hollow LED illuminator, which is particularly suitable for high-power high-brightness LED bulbs, which can emit strong light for a long time, but can overcome high temperature and the like. problem.

The technical problem to be solved by the invention is to provide a bulb with a hollow LED illuminator which is compact in structure, convenient in production, low in production cost, stable in quality and wide in application range, and can not only effectively dissipate the high-temperature heat generated during the illuminating process, but also The temperature of the LED light-emitting chip is greatly reduced, thereby prolonging the service life of the LED light-emitting body and ensuring the light-emitting effect of the light bulb, which is extremely valuable for industrial use.

Another technical problem to be solved by the present invention is to overcome the blue leakage phenomenon by improving the structure of the LED illuminator, and to ensure an excellent lighting effect.

In order to achieve the above object, the technical solution adopted by the present invention is:

A bulb having a hollow LED illuminator comprises a hollow LED illuminator, a bracket and a bulb cover, wherein the hollow LED illuminator is enclosed in a bulb cover by a bracket; and the bulb cover inner cavity is filled with a heat conduction gas.

Wherein, the hollow LED illuminator comprises a fluorescent tube, an LED light source disposed inside the fluorescent tube, a pin connected to both ends of the LED light source and exposing the fluorescent tube, and a pin disposed on the pin for fixing the fluorescent tube a sliding member; the inner cavity of the fluorescent tube is kept flowing through the nozzle at both ends of the fluorescent tube and the inner cavity of the bulb cover; the inner side of the fluorescent tube is evenly coated with phosphor; the LED light source comprises a substrate and is fixed on the substrate. LED chip.

The present invention is further provided that a fluorescent sheet is disposed on an axially outer side of the nozzles at both ends of the fluorescent tube, and the fluorescent sheet does not block the flow of the inner portion of the fluorescent tube and the inner cavity of the bulb cover.

The present invention is further configured such that the fluorescent sheet is disposed 2-5 mm in the axial direction away from the nozzles at both ends of the fluorescent tube.

The invention is further provided that the bracket is a transparent bracket.

The invention is further provided that the bulb cover is a glass bulb cover.

The invention is further arranged such that the heat conducting gas is helium.

The present invention is further provided that the fluorescent tube is a transparent tube in which the phosphor is uniformly coated on the inner side.

The invention is further provided that the transparent tube is a glass tube, a ceramic tube or a plastic tube.

The present invention is further configured that the substrate is a transparent carrier whose surface is coated with a highly thermally conductive transparent coating. board.

The invention is further arranged such that the substrate is a glass plate coated with a diamond-like carbon coating on its surface.

In the bulb of the present invention, the hollow LED illuminator is enclosed in the bulb cover through the bracket, and then the air is removed, and helium gas of about 0.5-0.8 atm is injected. The thermal conductivity of helium is about 6 times that of air. When the LED illuminator is used to generate heat, the helium gas in the inner cavity of the bulb will generate a thermal disturbance airflow, and the airflow will quickly dissipate the heat from the filament according to the circulation speed of the airflow. The substrate; at the same time, the fluorescent tube holding the airflow through the hollow LED illuminator forms a chimney effect, which can quickly discharge heat from the fluorescent tube nozzle to accelerate the heat dissipation cycle, and heat is circulated to the surface of the heat conducting bulb cover to be cooled; The airflow velocity of the inner cavity of the fluorescent tube is higher than that outside the tube, forming an orderly airflow heat-dissipating cycle; thereby effectively solving the problem of filament heat dissipation.

In addition, by adding a fluorescent sheet, the leaked blue light is converted into white light through the fluorescent sheet, and the blue leakage problem is directly solved. The fluorescent sheet needs to be disposed on the axial outer side of the nozzles at both ends of the fluorescent tube, and cannot directly cover the nozzle to affect the gas flow through the lumen of the fluorescent tube, that is, the fluorescent sheet does not block the flow of the inner portion of the fluorescent tube and the inner cavity of the bulb cover. Preferably, the fluorescent sheet is disposed 2-5 mm in the axial direction away from the nozzles at both ends of the fluorescent tube, which overcomes the leakage blue and ensures efficient heat dissipation.

The substrate in the hollow LED illuminator is preferably a glass plate coated with a diamond-like carbon coating, which has high insulation withstand voltage, excellent thermal conductivity, and greatly reduced cost.

In summary, the light bulb with the hollow LED illuminator provided by the invention has the advantages of compact structure, convenient manufacture, low production cost, stable quality and wide application range, and can not only pass the high temperature heat generated during the illuminating process through the chimney. The effect is quickly diverted and effectively dissipated, so that the temperature of the LED light-emitting chip is greatly reduced, and the blue leakage phenomenon can be overcome, thereby prolonging the service life of the LED illuminator and ensuring the excellent lighting effect of the bulb.

The above is only an overview of the technical solutions of the present invention. For a clear understanding of the technical means of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.

DRAWINGS

FIG. 1 is a schematic structural view of a hollow LED illuminator according to an embodiment of the present invention.

detailed description

The invention will now be further described with reference to the drawings of the specification.

The invention provides a light bulb with a hollow LED illuminator, comprising a hollow LED illuminator, a bracket and a bulb cover, and the hollow LED illuminator is packaged in a bulb cover together with a wire and the like by a bracket The inside of the bulb cover is filled with a heat-conducting gas such as helium. The bracket is preferably a transparent bracket; the bulb cover is preferably a glass bulb cover; both of which can be made of a glass material to ensure excellent lighting effects.

As shown in FIG. 1 , the hollow LED illuminator includes a fluorescent tube 1 , an LED light source 2 disposed inside the fluorescent tube 1 , and a lead 3 connected to both ends of the LED light source 2 and exposing the fluorescent tube 1 . And a sliding member 4 disposed on the pin 3 for fixing the fluorescent tube 1; the inner cavity of the fluorescent tube 1 is kept flowing through the nozzle at both ends of the fluorescent tube 1 and the inner cavity of the bulb cover; the inner side of the fluorescent tube 1 The phosphor is uniformly coated; the LED light source 2 includes a substrate 21, blue light or other color mixed LED chips 22 fixed on the substrate 21.

The substrate 21 is a transparent carrier plate coated with a high thermal conductive transparent coating such as a diamond-like carbon coating, which may be a glass plate or a transparent ceramic plate; the insulation withstand voltage is high, the thermal conductivity is excellent, and the cost is extremely low.

The fluorescent tube 1 is a transparent tube uniformly coated with a phosphor on the inner side; the transparent tube is a glass tube, a ceramic tube or a plastic tube.

In order to solve the problem of blue leakage in the prior art, the bulb with the hollow LED illuminator of the present invention is realized by providing a fluorescent sheet on the axial outer side of the nozzles at both ends of the fluorescent tube 1 , and the fluorescent sheet is required to be The airflow of the inner cavity of the fluorescent tube and the inner cavity of the bulb cover is blocked. The fluorescent sheet is preferably positioned 2-5 mm in the axial direction away from the nozzles at both ends of the fluorescent tube.

Compared with the prior art, the innovation of the present invention is that the hollow LED illuminator is packaged in the bulb cover through the bracket, and then the air is removed, and the helium gas is injected at about 0.5-0.8 atmosphere; when the LED illuminator is lit When heat is generated during use, the helium gas in the inner cavity of the bulb cover generates a thermally disturbed airflow, and the chimney effect formed by the fluorescent tube that keeps the airflow through the hollow LED illuminator can quickly dissipate the heat from the substrate in the filament and heat it. It is quickly discharged from the fluorescent tube nozzle to accelerate the heat dissipation cycle, and then the heat is circulated to the surface of the bulb cover to be cooled, and the overall air circulation is cyclically ordered. Moreover, by adding a fluorescent sheet, the leaked blue light is converted into white light through the fluorescent sheet, and the blue leakage problem is directly solved.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is only described in the foregoing description and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A bulb having a hollow LED illuminator, comprising: a hollow LED illuminator, a bracket and a bulb cover, wherein the hollow LED illuminator is enclosed in a bulb cover by a bracket; and the bulb cover is filled Have a heat transfer gas;

The hollow LED illuminator comprises a fluorescent tube, an LED light source disposed inside the fluorescent tube, a pin connected to both ends of the LED light source and exposing the fluorescent tube, and a sliding member disposed on the pin for fixing the fluorescent tube ;

The inner cavity of the fluorescent tube is kept flowing through the nozzles at both ends of the fluorescent tube and the inner cavity of the bulb cover;

The inner side of the fluorescent tube is uniformly coated with a phosphor;

The LED light source includes a substrate and an LED chip fixed on the substrate.
The light bulb with a hollow LED illuminator according to claim 1, wherein a fluorescent sheet is disposed on an axial outer side of the nozzles at both ends of the fluorescent tube, and the fluorescent sheet does not block the fluorescent tube lumen and the bulb cover. The airflow in the inner cavity penetrates.
The light bulb having a hollow LED illuminator according to claim 2, wherein the fluorescent sheet is disposed 2-5 mm in an axial direction away from the nozzles at both ends of the fluorescent tube.
The light bulb with a hollow LED illuminator according to claim 1, wherein the bracket is a transparent bracket.
The light bulb with a hollow LED illuminator according to claim 1, wherein the bulb cover is a glass bulb cover.
The light bulb having a hollow LED illuminator according to claim 1, wherein the heat transfer gas is helium.
The light bulb having a hollow LED illuminator according to claim 1, wherein the fluorescent tube is a transparent tube in which a phosphor is uniformly coated on the inner side.
The light bulb with a hollow LED illuminator according to claim 7, wherein the transparent tube is a glass tube, a ceramic tube or a plastic tube.
The light bulb with a hollow LED illuminator according to claim 1, wherein the substrate is a transparent carrier plate coated with a highly thermally conductive transparent coating.
The light bulb with a hollow LED illuminator according to claim 9, wherein the substrate is a glass plate coated with a diamond-like carbon coating.